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- 03-27-2012, 07:16 AM #1
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URGENT help needed in copying array contents
Ok so I am still doing this homework lab assignment and I was doing ok on it at first but this is starting to REALLY tick me off. So the lab that I am doing is about checking test scores by importing and processing data files and this is the main program:
//Mark Herrera
import java.util.Scanner;
import java.io.*;
import DriverExam.DriverExam;
public class Chapter7ALabDemo
{
public static void main (String [] args) throws IOException
{
File file;
Scanner readKey;
Scanner readAnswers;
String str;
int numQuestions;
DriverExam student;
int [] missedQuestions;
Scanner keyboard = new Scanner(System.in);
System.out.println("Enter the name of the file that is the test key ");
str = keyboard.nextLine();
file = new File(str);
readKey = new Scanner(file);
System.out.println("Enter the name of the file with the student answers.");
str = keyboard.nextLine();
file = new File(str);
readAnswers = new Scanner(file);
System.out.println("How many test questions are there?");
numQuestions = keyboard.nextInt();
student = new DriverExam(readKey, readAnswers, numQuestions);
missedQuestions = student.questionsMissed();
System.out.println(student);
if (student.passed())
System.out.println("The student passed.");
else
System.out.println("The student did not pass.");
System.out.println("The student got " + student.totalCorrect() + " answers correct.");
System.out.println("The student got " + student.totalIncorrect() + " answers incorrect.");
System.out.println("The following questions were missed by the student: ");
student.printMissed(missedQuestions);
}
}
And now this is the class that I am making. Take a look.
//Mark Herrera
package DriverExam;
import java.util.Scanner;
public class DriverExam {
private char[] answerKey;
private char[] studentAnswers;
public DriverExam(Scanner rKey, Scanner rAnswers, int numOfQuestions)
{
int questions = 0;
String rk;
String ra;
answerKey = new char[numOfQuestions];
studentAnswers = new char[numOfQuestions];
while (rKey.hasNext() && rAnswers.hasNext() && (questions < numOfQuestions))
{
rk = rKey.nextLine();
ra = rAnswers.nextLine();
answerKey[questions] = rk.charAt(0);
studentAnswers[questions] = ra.charAt(0);
questions++;
}
}
public int totalCorrect()
{
int correctTotal = 0;
for (int index = 0; (index < answerKey.length) && (index < studentAnswers.length); index++)
{
if (answerKey[index] == studentAnswers[index])
correctTotal++;
}
return correctTotal;
}
public int totalIncorrect()
{
int incorrectTotal = 0;
for (int index = 0; (index < answerKey.length) && (index < studentAnswers.length); index++)
{
if (answerKey[index] != studentAnswers[index])
incorrectTotal++;
}
return incorrectTotal;
}
public boolean passed()
{
if (totalCorrect() >= 0.75*answerKey.length)
return true;
else
return false;
}
public int[] questionsMissed()
{
int numQuestionsMissed = totalIncorrect();
int[] missed = new int[numQuestionsMissed];
for (int index = 0; (index < answerKey.length) && (index < studentAnswers.length); index++)
{
if (answerKey[index] != studentAnswers[index])
{
for (int number = 0; number < missed.length; number++)
{
missed[number] = index + 1;
}
System.out.println(index+1);
}
}
return missed;
}
public void printMissed(int [] questionsMissed)
{
for (int qMissed : questionsMissed)
System.out.print(qMissed);
}
}
Enter the name of the file that is the test key
key3.txt
Enter the name of the file with the student answers.
ans3.txt
How many test questions are there?
25
1
12
13
14
25
DriverExam.DriverExam@1a758cb
The student passed.
The student got 20 answers correct.
The student got 5 answers incorrect.
The following questions were missed by the student:
2525252525Last edited by Terminus_Est; 03-27-2012 at 07:21 AM.
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